Structure and Properties of PET Nano-Porous Luminescence Fibers for Fluorescence-Indicating to Acid Gases

This work describes the fluorescence-indicating function to trace acid gases of polyethylene terephthalate (PET) nano-porous luminescence fibers (PNPLFs) through the analysis of correlation between the concentration of acid gas and fluorescence intensity of organic rare earth complexes dispersed uniformly in the PET nano-porous structured fibers. The porous structure and large specific surface area of the PET nano-fibers prepared through electrospinning technology offer the strong adhesive force and good absorption efficiency of PET nano-porous fibers to acid gases. The fast response ability of benzoic acid organic rare earth complexes to pH value gives the PET nano-porous luminescence fibers fluorescence-indicating function to acid gas. Under dry state and in situ conditions, the fluorescence-indicating to acid gases of PET nano-porous luminescence fibers can be completed in 10 s. The precise value is 1 ppm. At the same time, repeated cycling experiments show that the PET nano-porous luminescence fibers have good recycling property, and the recycling life can increase 40-fold. Coupled with the good mechanical performances that the breaking strength achieves 121.6 cN, the PET nano-porous luminescence fibers have better potential in the fluorescence-indicating to acid gases.